Can’t be so bad:
Macroscopic object (40kg) cooled to 77 nanokelvin:
https://news.mit.edu/2021/motional-ground-state-ligo-0618
Can’t be so bad:
Macroscopic object (40kg) cooled to 77 nanokelvin:
https://news.mit.edu/2021/motional-ground-state-ligo-0618